JPS632242A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To obtain a fluorescent lamp having an excellent starting characteristic allowing much energy saving, by forming a conductive stripe on the outer surface of its glass tube and forming a transparent conductive film on the inner surface. CONSTITUTION:A glass tube 1 of 26mm or less in inner diameter is provided with a metallic stripe 2 formed on the outer surface or a transparent conductive film on the inner surface, being filled with a kind of or two kinds of gases out of Kr, Ne, Xe mixed with Ar. A potential gradient between an emitter electrode in the fluorescent lamp and the metallic stripe becomes large directly before the starting of the lamp, which causes minute discharge between them and results in an effect of improving the starting characteristic. Such an effect can be also obtained by forming a transparent conductive film on the inner surface of the glass. An improving effect of the starting characteristic does not appear when the inner diameter of the tube is about 30 mm, however, it appears as the inner diameter decreases.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a low-power fluorescent lamp.

[Conventional technology]

Reduce the tube diameter and fill the gas ftKr-Ar, Kr-Xe.
An example of a fluorescent lamp that saves power by using -Ar is Utility Model Application No. 48-61678. Examples include Utility Model Publication No. 48-62873 and Japanese Patent Application Publication No. 53-110273.

[Apex while the invention is trying to solve]

All of these lamps have a larger tube diameter, for example, an inner diameter of 30 m, and are inferior in starting characteristics to fluorescent lamps with a filled gas of 100% Ar.

In particular, the deterioration of starting characteristics at low temperatures is significant. In addition, a glow lamp with poor performance such as a low pulse generation voltage has a practical problem in that it does not turn on.

The present invention solves the above problems.

[Means for solving problems]

The fluorescent lamp of the present invention has conductive stripes formed on the outer surface of the glass tube in the longitudinal direction. Alternatively, a transparent conductive coating is formed on the inner surface of the glass.

[Effect]

In the fluorescent lamp configured as described above, immediately before starting, the potential gradient between the emitter electrode in the fluorescent lamp and the metal stripe is large, and a slight discharge occurs during that time, resulting in the effect of improving starting performance. It will be done. Such an effect can also be obtained by forming a transparent conductive film on the inner surface of the glass. These effects do not appear when the pipe inner diameter is approximately 30 am, but they occur as the pipe inner diameter becomes smaller.

In other words, the discharge form shifts from glow discharge to arc discharge, and the rung becomes lit, but just before the transition to arc discharge, there is a large discharge impedance, and the smaller the tube diameter, the more gases such as K' * This is thought to be due to the fact that, although this impedance becomes higher in the presence of metal stripes on the outer surface and the conductive coating on the inner surface, the discharge impedance decreases.

〔Example〕

A tube with a filament electrode at both ends formed by coating an emitter on both ends with an inner diameter of 24ao1. A mixed gas of 1.6 to 1.9 smHg consisting of 70% Kr and 30% Ar is sealed in a tube with a tube length of approximately 1200 mm, and an aluminum foil tape 2 with a width of 3 m is attached to the outer surface of the glass tube 1 as shown in Fig. 1. Glue it in a stripe pattern excluding about Zwm from the edge to form a fluorescent lamp. The starting characteristics at 0C were compared between this fluorescent lamp and a fluorescent lamp without an aluminum foil tape. The pulse voltage of the glow lamp in FIG. 2 is the maximum voltage across the lamp generated by the kick operation of the glow lamp when the rated voltage is applied with a 40 W/200 V choke coil.

Compared to the starting voltage without aluminum foil tape in the range surrounded by a-a' and bb', the starting voltage with aluminum foil in the range surrounded by A-A' and B-B' is low in the low pulse voltage area. In practical terms, the problem of non-lighting does not occur.

In the above description, aluminum foil tape has been described as a metal stripe, but 1. For example, metal powder such as copper powder is adhered and formed on a glass surface using a binder.

A similar effect was obtained by forming a conductive film such as Nesa (SnO2) on the inner surface.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to obtain a fluorescent lamp that saves a lot of power and has no practical problems such as non-lighting. There is something called value.

[Brief explanation of the drawing]

FIG. 1 is a side view of a fluorescent lamp according to an embodiment of the present invention.
FIG. 2 is a diagram showing the starting characteristics of a fluorescent lamp at ambient temperature OC. 1...Glass tube, 2...Metal stripe, a-a'
. Range of bb'...Starting voltage of fluorescent double tube without metal stripe, range of A-A', B-B'...
Starting voltage of a fluorescent lamp with metal stripes. -9th 11f1

Claims (1)

[Claims] 1. A metal stripe is formed on the outer surface of a glass tube with an inner diameter of 26 mm or less, or a transparent conductive coating is formed on the inner surface, and Kr,
A fluorescent lamp characterized by being filled with a mixed gas of one or both of Ne and Xe and Ar.